کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
735501 | 1461745 | 2009 | 5 صفحه PDF | دانلود رایگان |
A compact experimental setup using advanced optical elements was designed to take Raman spectrum of liquid benzene. All seven Raman active vibrational modes were observed. A simplified mechanical model for two most intense in-phase modes, i.e., ring breathing and C–H stretching, shows that the vibrational contribution to the ratio of C–C and C–H bond strengths is a factor of ∼1.66. A simulation of Raman spectrum with Gaussian vibrational bands, weighted by Planck distribution function, yields the vibrational line widths and the relative polarizability changes. A value of 0.74 is estimated for the ratio of change in polarizability of C–H bond to that of C–C bond upon laser excitation from a simple electrostatic calculation, which is comparable with the value of 0.6 obtained from the simulation.
Journal: Optics and Lasers in Engineering - Volume 47, Issues 7–8, July–August 2009, Pages 842–846